Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6544b8004096e0…

MALICIOUS

PDF

33.2 KB Created: 2020-08-29 09:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b851140902b93aec32e8b2b7f6878d91 SHA-1: c4e716a02221ea162380fe565872f8e243b816d8 SHA-256: 4b6544b8004096e0643c31748777ce0b2bc2d1d8cc8b2ee8aa0985c987be8a53
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector, ttraff.com. It also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The document body contains garbled text but includes the malicious URL, indicating it's likely a lure to a phishing or malware site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=venda+de+moldes+de+silicona+para+por
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/52380472469.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/kusorimatovifozefikime.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/xaminadegevavixit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/dalikusabagunena.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/15238045102.pdf
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/the_norton_anthology_of_american_literature.pdf
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/65277980678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/wejosawed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/97959570849.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bf75445de134018b01cbe6209c793e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3081abcf207469e91cb6031945b2bdb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004219.bin
b20030bb6e8fb9d5e590874bbb5def3cbaa30e95c057febf4f6cd6ba50582932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4219 5184 bytes
font_01_sfnt_off000053a5.bin
42ced8ef9b692c9b3c678154132fde452d4698d95e54f299146b0941aaa1e208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A5 10624 bytes

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